File grinding machine



(No Model) 4 Sheets-Sheet 1.

J. TURNER. FILE GRINDING MACHINE.

Patented Apr. 27, 1897 F .1

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(No Model.) 4 Sheets-Sheet 2. J. TURNER.

FILE GRINDING MACHINE.

No. 581,473. Pa'tentedApr. 27, 1897.

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(No Model.) 4 SheetsSheet 3.

J. TURNER.

FILE GRINDING MACHINE. No. 581,473. Patented Apr. 27, 1897.

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J. TURNER. FILE GRINDING MACHINE.

No. 581,473. Patented Apr; 27, 1897.

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4 UNITED STATES PATENT OFFICE.

JAMES TURNER, OF PATERSON, NEW JERSEY, ASSIGNOR TO THE KEARNEY 85 FOOT COMPANY, OF NEW' YORK, N. Y.

FILE-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 581,473, dated April 27, 1897.

Application filed July 18, 1896. Serial No. 599,667. (No model.)

To all whom it may concern:

Be it known that I, JAMES TURNER, a citi zen of the United States, residing at Paterson, in the county of Passaic and State of New Jersey, have invented certainnew and useful Improvements in File-Grinding Machines, of which the following is a specification.

My invention has for its object to grind the rounded faces of what are known as halfround files; and to this end my'invention consists of a machine provided with one or more rocking beds, to which the file-blanks are connected, and with means whereby the said blanks may be carried opposite a grinder longitudinally while rocked transversely and automatically, substantially as set forth hereinafter and as illustrated in the accompanying drawings, in which Figure 1 is an elevation of my improved file-blank-grinding machine. Fig. 2 is a sectional view on the line 2 2 of Fig. 1. Fig. 3 is a detached enlarged view of some of the devices. Fig. 4 is a plan view of Fig. 2. Fig. 5 is an enlarged plan of the rocking beds and supporting-frame. Fig. 6 is a side view ofFig. 5. Fig. 7 is an end view of the rocking beds.

The frame A of the machine is of suitable construction to support the other parts and has guides for a reciprocating cross-head B, from which hangs, by a rod 1, the frame 0, which contains a series of halfround-file blanks to be operated upon by the grindstone D. These parts, so far as their general arrangement and the means fol-imparting areciprocating motion to the cross-head B and for operating the grindstone are concerned, may be practically similar to those illustrated in the Letters Patent to ANVeed, No. 287,746, dated October 30, 1883, and need not therefore be further described.

As theobject of my improvement is to operate upon blanks having rounded faces to grind half-round files, I provide the reciprocating frame 0 with a holder E, supportingany desirable number of rocking beds F for the blanks.

The construction of the frame and bed is best illustrated in Figs. 5 and 6, in which seven beds are shown, but as each one of them is like the others the description of one Will be sufficient.

The bed F consists of a bar or rod supported at the ends upon trunnions or pivots, as desired. As shown, the lower end of each bed is recessed to receive a conical stud 3, projecting from a cross-bar 4 of the frame, while the upper end of the bed is extended, as a round rod or trunnion 5, through an opening in another cross-bar 6. Near the lower end the bed has two side lugs 7 8, adapted to receive between them the tang of the fileblank, while a perforated lug 9 receives the extreme end of the said tang and holds the blank in place. The face 00 of the bed from the lugs 7 8 to a pointy where the end of the blanks would lie is slightly curved, so that the blank may be swung downward to impart a more desirable form or outline to the file, and when a blank is thus placed into position upon the bed a sliding sleeve 10 may be pushed downward, so as to receive the end of the blank and hold it in place. To retain the blank securelyin place and prevent movement or rattling, I prefer to insert blocks of rubber 12 at different points, projecting slightly above the bed, so as to constitute a yielding bearing for the blank.

Any suitable means may be employed for imparting a rocking motion to the bed as the carriage 0 moves up and down opposite the grindstone to thereby grind the rounded faces of the file to the desired shape. One means consists of providing each bed with an. arm 14, extending from the upper end, all the arms being connected together by a link 15, to which a reciprocation is imparted. As shown, the link has an arm 16, in which there is a slot w, and into the latter extends a crankpin 17 from an arm 18 of a shaft 19,to which a' rotary motion is automatically imparted. By this means the rotation of the shaft will swing the link 15 first in one direction and then in the other, thereby imparting the desired rocking movement to all of the beds simultaneously. ,One means of imparting rotation to the shaft 19 is to employ a ratchetwheel operated intermittently by a pawl. Thus, as shown, a bracket G is bolted to one side of the frame A and has a hub 20, supporting a ratchet-wheel 21, through which passes the angular or feathered shaft 19. A pawl 22 engages the ratchet 21 and is carried by an arm 23, extending from a ring which oncircles the hub of the ratchet-wheel 21, so as to swing freely thereon. With the arm 23 is connected one end of a link 2 L, which at its opposite end is connected to the arm 25 upon a rockshaft 20, turning in the brackets G. At the inner end of the shaft are two oppositely-extended arms 27 28, the former in position to be struck by a pin 29 upon the cross-bar B and the latter in position to be struck at its under side by a pin 30 on the said cross-bar. As shown, each pin is connected with a plate secured vertically adj ustablyto the crossbar, so that the positions of the pins may be changed. A spring 31, connected with the arm 25, serves to always carry the said arm to the right, Fig. 1.

lVhen the crossbar B ascends with its carriage G to its upper position, as shown in Fig. 1, the pin 30 strikes the arm 28 and rocks the cross-bar 29 so as to swing the arm 23 and its pawl in the direction of the arrow, Fig. 4, thereby turning the shaft 1 9 in this direction. hen the cross-bar begins to descend, the spring 31 carries the arm 25 and the pawl to the right, so that as the cross-bar B reaches its lowest position the pin 29 will strike the arm 27 and again swing the rock-shaft and carry the arm 23 and its pawl forward and still further turn the shaft 19. By these movements there is an intermittent rotation imparted to the shaft 19, which carries the crank-pin 17 in a circle, reciprocating the link 15 and rocking the beds F, so that as the carriage also moves up and down the blanks upon these beds will gradually be ground to the rounded form desired.

It will be obvious that the general arrangement of the machine may be varied without departing from the main features of my invention. There may be but a single rocking bed, reciprocated and rocked in proximity to a grinder of any suitable character, and different means may be employed for imparting the reciprocating and rocking movement.

\Vithout limiting myself to the precise construction and arrangement of parts shown, I claim as my invention- 1. The combination in a grinding-machine of a grinding-wheel, a carriage arranged tangentially opposite said wheel, means for reciprocating the carriage, a series of rocking beds supported by the carriage and adapted to hold file-blanks, and means for automatically rocking said beds, substantially upon their longi tudinal axes, substantially as described.

2. The combination with the reciprocating carriage and grinder of a grinding'machine, of a series of rocking beds each provided with an arm, a link connected with all of said arms, and means for automatically reciprocatingthe links, substantially as set forth.

The combination with the carriage, of a rocking bed having a curved face wand means of securing a file-blank upon said face, sub stantially as set forth.

4. In afile-grinding machine, the combination with a reciprocating bed having a curved face with bearings at its ends and yielding bearings intermediate the ends of said bed, substantially as described.

5. The combination of the rocking bed F having a recess at one end to receive the tang of a file-blank, and a sliding sleeve 10 for securing the point of the blank, substantially as set forth.

6. The combination with a reciprocating carriage, roekin g beds carried thereby, a link having a slotted arm 16, a shaft moving with the carriage and provided with a crank-pin 17 entering the slot of said arm, and means for rotating the shaft, substantially as set forth.

7. The combination with the reciprocating carriage, its rocking bed, and shaft 19, of a ratchet-wheel through which the shaft passes, a bracket supporting the said ratchet-wheel, an arm carrying a pawl engaging said wheel, a roek shaft provided with arms one of which is connected with the pawl-arm, and studs or pins upon the support for the carriage O arranged to make contact with the arms of the rock-shaft, substantially as and for the purpose set forth.

8. The combination with a reciprocating carriage and crossbar, of the rocking beds and shaft 19 for operating the same, a bracket G carried by the frame of the machine and supporting a ratchet-wheel through which the shaft 19 extends, a rock-shaft supported by the bracket and provided with arms, one of which is connected with an arm carrying a pawl engaging the ratchet-wheel, and ad justable pins 29, 30 upon the cross-bar B, substantially as described.

9. In a file-cutting machine the combination of a reciprocating carriage, of rocking beds having trunnions which are received in openings in the carriage, and means for rocking the beds, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribin witnesses.

JAMEI TURNER.

Vitnesses:

JAMES D. Foo'r, (Inns. E. WATTs. 

